Category: meter
LED based transistor tester by CD4011
| June 2, 2010 | Posted by admin under led display, meter |
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Here is the circuit of a very simple transistor tester which used two LEDs for displaying the condition of a transistor. Both PNP as well as NPN transistors can be tested using this circuit. Quad 2 input CMOS NAND gate IC CD4011B is the heart of the circuit. Out of the four NAND gates inside…
2 Parking Sensor System and Led Display
| May 29, 2010 | Posted by admin under check circuit, led display, meter |
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4 Piece Rear Parking System (Sensors x 2, ain, Display) 2 x 1-Inch Diameter Wired Rear Sensors (9 Foot) Digital Distance Object Wired Indicator (25 Foot) 4 Color 7 Stage Led Indicator 4 Stage Built-in Beeping Alarm Display Distance: 2.0m ~ 0.3m Reverse Sensor Trigger Sensor Cutout Tool Included… Read more
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